Personally I, on the worker side of this relationship, enjoy the tracker - but I seem to be part of a tiny minority.
That being said, I've been involved with the hiring side of IT contracting before, and I can say without nuance that it would be a train wreck without some form of tracker.
Is the above just a personal squeak of disapproval or do you know of a way to avoid it while hiring strangers from around the world?